41 Experimenting With Unconventional Wheels
by John Blankenship and Samuel Mishal
Put a new spin on your robot base with omni
or mecanum style wheels.

46 Extending the Beginner Bot With the PropBOE
by Gordon McComb

In this final installment, discover how to use the
Parallax Propeller to provide full autonomous
control of your robot.

54 Book Review The ArduinoCookbook
by Steven Nelson

56 Pimp My Hexapod — Part 1
by Matt Bunting

Follow the transformation from a Frankenstein
mixture of parts to a full upgrade for this
six-legged “freak.”

62 PR Lite — Build Your Own PR2 Running ROS
by Alan, Andrew, and Matthew Downing,
Nathaniel Lewis, and Frank and Robert Ou
Discover how a motivated high school team
and their mentor fathers combined resources
to build their own version of the high-end PR2.